Meaning – The word block, refers to a string of data elements recorded or transmitted as a unit. The elements may be characters, words, or physical records. The process of putting the data into a block is called blocking, while the process of extracting data from the block, is called deblocking.

One of the advantages of blocks, is that they reduce the overheads and as a result, speed of the data handling streams. This is probably the reason why most of the file systems today, are based on a block device.

Blocking is almost universally employed when storing data to 9-track magnetic tape, NAND flash memory, and rotating media such as floppy disks, hard disks, and optical discs.

Example of Usage “The employee was tasked with extracting all the data placed in the block”.